1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
-- source include/have_ndb.inc
--disable_warnings
drop table if exists t1;
--enable_warnings
#
# Simple test to show use of ordered indexes
#
CREATE TABLE t1 (
a int unsigned NOT NULL PRIMARY KEY,
b int unsigned not null,
c int unsigned,
KEY(b)
) engine=ndbcluster;
insert t1 values(1, 2, 3), (2,3, 5), (3, 4, 6), (4, 5, 8), (5,6, 2), (6,7, 2);
select * from t1 order by b;
select * from t1 where b >= 4 order by b;
select * from t1 where b = 4 order by b;
select * from t1 where b > 4 order by b;
select * from t1 where b < 4 order by b;
select * from t1 where b <= 4 order by b;
# Test of reset_bounds
select tt1.* from t1 as tt1, t1 as tt2 use index(b) where tt1.b = tt2.b order by tt1.b;
select a, b, c from t1 where a!=2 and c=6;
select a, b, c from t1 where a!=2 order by a;
#
# Here we should add some "explain select" to verify that the ordered index is
# used for these queries.
#
#
# Update using ordered index scan
#
update t1 set c = 3 where b = 3;
select * from t1 order by a;
update t1 set c = 10 where b >= 6;
select * from t1 order by a;
update t1 set c = 11 where b < 5;
select * from t1 order by a;
update t1 set c = 12 where b > 0;
select * from t1 order by a;
update t1 set c = 13 where b <= 3;
select * from t1 order by a;
update t1 set b = b + 1 where b > 4 and b < 7;
select * from t1 order by a;
-- Update primary key
update t1 set a = a + 10 where b > 1 and b < 7;
select * from t1 order by a;
#
# Delete using ordered index scan
#
drop table t1;
CREATE TABLE t1 (
a int unsigned NOT NULL PRIMARY KEY,
b int unsigned not null,
c int unsigned,
KEY(b)
) engine=ndbcluster;
insert t1 values(1, 2, 13), (2,3, 13), (3, 4, 12), (4, 5, 12), (5,6, 12), (6,7, 12);
delete from t1 where b = 3;
select * from t1 order by a;
delete from t1 where b >= 6;
select * from t1 order by a;
delete from t1 where b < 4;
select * from t1 order by a;
delete from t1 where b > 5;
select * from t1 order by a;
delete from t1 where b <= 4;
select * from t1 order by a;
drop table t1;
#
#multi part key
#
CREATE TABLE t1 (
a int unsigned NOT NULL PRIMARY KEY,
b int unsigned not null,
c int unsigned not null
) engine = ndb;
create index a1 on t1 (b, c);
insert into t1 values (1, 2, 13);
insert into t1 values (2,3, 13);
insert into t1 values (3, 4, 12);
insert into t1 values (4, 5, 12);
insert into t1 values (5,6, 12);
insert into t1 values (6,7, 12);
insert into t1 values (7, 2, 1);
insert into t1 values (8,3, 6);
insert into t1 values (9, 4, 12);
insert into t1 values (14, 5, 4);
insert into t1 values (15,5,5);
insert into t1 values (16,5, 6);
insert into t1 values (17,4,4);
insert into t1 values (18,1, 7);
select * from t1 order by a;
select * from t1 where b<=5 order by a;
select * from t1 where b<=5 and c=0;
insert into t1 values (19,4, 0);
select * from t1 where b<=5 and c=0;
select * from t1 where b=4 and c<=5 order by a;
select * from t1 where b<=4 and c<=5 order by a;
select * from t1 where b<=5 and c=0 or b<=5 and c=2;
select count(*) from t1 where b = 0;
select count(*) from t1 where b = 1;
drop table t1;
#
# Indexing NULL values
#
CREATE TABLE t1 (
a int unsigned NOT NULL PRIMARY KEY,
b int unsigned,
c int unsigned,
KEY bc(b,c)
) engine = ndb;
insert into t1 values(1,1,1),(2,NULL,2),(3,NULL,NULL),(4,4,NULL);
select * from t1 use index (bc) where b IS NULL order by a;
select * from t1 use index (bc)order by a;
select * from t1 use index (bc) order by a;
select * from t1 use index (PRIMARY) where b IS NULL order by a;
select * from t1 use index (bc) where b IS NULL order by a;
select * from t1 use index (bc) where b IS NULL and c IS NULL order by a;
select * from t1 use index (bc) where b IS NULL and c = 2 order by a;
select * from t1 use index (bc) where b < 4 order by a;
select * from t1 use index (bc) where b IS NOT NULL order by a;
drop table t1;
|
